MEASURING
INSTRUMENTS
Page 6 of 7
2 USE OF THE INSTRUMENT
Using the tool is very simple. To turn on the spirit level-protractor, simply press the ON/OFF
button located on the side of the display (Ref. C Figure 2). The first time the button is
pressed the instrument is turned on, when the button is press again it will turn off the
instrument.
There is a button on the keypad used to turn on the backlight of the display (ref A) and the
HOLD button (ref B) to keep a value displayed even after the angle has been changed.
Figure 2 – Control keypad
Turning off the protractor
The goniometer is not equipped with an automatic switching-off function. So be sure to
manually turn off the instrument after use to conserve battery life.
To perform the measurement, position the body of the instrument on a measuring surface
and bring the surface plate into contact with another surface creating an angle with the first
and leading to a value being displayed. The instrument is also has a spirit level with two vials
to check the horizontal level of the surface against which the angular measurement will be
performed.
A
B
C
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